Parents Marcus A Dougherty, NC

Trying to locate the parents of Marcus A Dougherty, born Sep 24, 1837, died Aug 5, 1897, married Mattie L Wells, Born Sep 15, 1846, died Apr 12, 1917.Both are buried in the Newton (NC City Cemetery.They had six (6) daughters and one (1) son.Would also like to locate any siblings.Tradition is that he may have been adopted. Many thanks for any help!